Any of several geological sciences that are concerned with the earth, its origins, and all of its various structures and physical forms and phenomena.
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在无林地上进行的植树造林活动。把土地转变为森林，尤其是为了商业用途。
一个结构面（如层面或断层面）与水平方向形成的角度，测量时的倾角方向与走向相垂直，并位于垂直平面内。
